Pipe-wrench.



No. 696,339.. Patented Man. 25, 1902-.

w. n. HUNTOON.

PIPE WRENCH;

I (Application filed June 12, 1901.) I

lllllllllll 2 "mumm- UNITED STATES PATENT OFFICE.

WILLIAM D. l-IUNTOON, OF NORWOOD, MASSAOHUSETTS.

PIPE-WRENCH.

SPECIFICATION ibrming' part of Letters Patent NO. 696,339, dated March 25, 1902.

Application filed June 12, 1901. Serial No. 64,294. (No model.)

"lows, reference being had to the accompanying drawings, where Figure 1 represents a side elevation of my improved pipe-wrench, showing a pipe held and secured between its stationary and movable jaws. Fig. 2 represents a longitudinal section on the line 2 2 shown in Fig. 1. Fig. 3 represents a longitudinal section on the line 3 3 shown in Fig. 2. Fig. Arepresents a cross-section 011 the line 4 4 shown in Figs. 1

and 3, and Fig. 5 represents a modification of the stationary and movable jaws between which the pipe is held. I

Similar letters refer to similar parts wherever they occur on the different parts of the drawings.

In the drawings, A represents the frame of the device, having a hooked upper end A,

to the under side of which is secured in a de-.

tachable manner the stationary jaw B, as shown. The said jaw is provided with a perforated-lug or ear 1), adapted to be received in a corresponding recess in theinner portion of the hooked end A. .O is a preferably slightly-tapering pin which is driven through a lateral perforation in the hook A and through the perforated ear I), by which arrangement said jaw B is prevented from lateral motion and also firmly secured to said hooked end A. If it is desired to remove the said jaw B and substitute another one for" clamping a pipe of a larger or smaller diameter, all that is necessary to do is to knock out the pin 0 from the hook A and perforated ear I) on the jaw 13, when the latter may readily be removed and replaced with another one to be secured in the same manner as above described.

Integral with the lower end of the frame A is an internally-screw-threaded socket A, through which is screwed the upper screwthreaded portion cl of the shank D, provided at its lower end with a handle D, as is .usualin devices of this kind. Inconnection with said screw-threaded shank I employ a longitudinally-divided carrier-block, which is composed of two equalparts E E, having hooked rear ends 6 e, whichembrace and are guided on the frame A, as shown. Said divided block portions E E after being placed upon the frame A are secured together, preferably by means of a headed screw-bolt F going loosely through a perforation in one of the partsE and screwed into a screw-threaded perforation in the other, as shown in Figs. 1, 3, and 4. The upper end of the screwspindle d is connected in a suit-able manner to the divided carrier-block, so as to cause the latter to be moved up and down during the rotary adjustment of the said screwthreaded shank D cl, as shown in Figs. 2 and 3.

G is the lower adjustable jaw, which is a duplicate of the upper stationary jaw B, as shown. Said jaw G is made to rest in a recess E in the upper part of the carrier-block E E and is provided with a perforated ear g, received in a corresponding recess in the carrier-block and secured thereto in a detachable manner by means of a pin H, which is driven through a perforation in the carrierblock and ear 9 in a manner and for a purpose like that shown and described relative to the upper jaw B. It will thus be seen that said upper stationary andlower movable jaws may readily be removed and substituted by others for pipes of difierent sizes, as may be needed from time to time.

The inner faces of the jaws B G are semicylindrical, or nearly so, corresponding to the size of the pipe I that is being grasped and held between the said jaws.

In practice I prefer to make integral with the frame A on its rear portion a strengthening-rib A as shown in Figs. 1, 3, and A. It will thus be seen that by turning the shank D toward the right the pipe I is caused to be clamped and held firmly by friction between the said movable and stationaryjaws during the operation of turning the pipe in making pipe connections, &c. p

Where it is desired to grasp the pipe and hold it still more firmly between the jaws B G, I secure to the latter hardened-steel bars I) b g g, preferably rectangular in section, as shown in Fig. 5, which when forced in conably secured together and provided with hooked extensions e, e, embracing the sides and outer face of the said frame, and jaws B, G, fitted in recesses in the hook A and carrier-block, and detachably secured therein, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

WILLIAM D. HUN TOON. Witnesses:

ALBAN ANDRliN, CHARLES ATHON HALL. 

